﻿class UniqueThreeDigitNumbers

{

    static void Main()

    {

        int count = 0;

        for (int i = 1; i <= 4; i++)

        {

            for (int j = 1; j <= 4; j++)

            {

                for (int k = 1; k <= 4; k++)

                {

                    if (i != j && j != k && i != k)

                    {

                        count++;

                        Console.WriteLine($"{i}{j}{k}");

                    }

                }

            }

        }

        Console.WriteLine(count);

    }

}